Beam lock for looms



Feb. 7, 1928. 1,658,492

- J. MAG lLL BEAM LOCK FOR LOOMS Filed July 21 1921 Patented Feb. 7, 1928.

7 UNITED STAT JOHN MAGILL, OF MILFORD, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO DRAPER CORPORATION, OF HOFEDALE, MASSACHUSETTSQA CORPORATION OF MAINE. e

I r BEAM LOCK locks for looms.

The object of the invention s to produce 2 construction ofbeam lock havingprovision for supporting the beam in position-on the loom frame and locking it .in such position. In some beam locks there is a capac ty for vertical motion of the warp beam in the operation of the loom, and with each forward beat of the lay the warp beam Jumps, owing to the pull on the warp. This is obviously objectionable, and among other things the present invention contemplates a construction by which suchjumpmg is prevented. To these ends thepresent invention consists in the beam lock hereinafter described and particularly defined in the claims. I

In the accompanying drawings illustrating the preferred form- 0f the invent on, Fig, l is a rear elevation of a portion of a' loom showing the beam supports and locks in position, holding the beam in placege-Flg. 2 is a side elevation of one of the beam locks showing the lockopen; Fig. 3 is a similar view showing the beam lock closed; and Fig.4 is a plan. 1 1 v The illustrated embodiment of the invention is described as follows: To the loom frame 1 isattached abracket -2,bo1ted to the loom frame. Each bracket is provided with a bearing toreceive'thefgudgwn 3 of the, warp beam. The bracket 2 is provided V with an overhanging arm '4, to which ,is

pivoted at 5thelocking lever 6. Coopefa-b ing with the locking lever is what .may conveniently be called a bolt 7, which is shown inopen position-in Fig. 2 and in closed position inFig. 3. The bolt consists ofa'grooved shaft engagingmember 8, whicheis provided on its underside with a groove 9, adapted to be pressed down against the (beam end 3. The grooved member Sis provided with two arms 10, one onveach side of the overhanging arm 4 of the bracket. Each lateral arm lO is provided with a laterally extend-ed car 11. The bolt is actuated by moving the locking lever from the open position, "as shown in ,Fig. 2, to the locked position, as shown in'Fig. 3. Theflocking lever is vprovided withtwo lateral cams 12, each adapted to engage one of the earsll ofthe bolt.

' The shape ofthecams l2'is such that when the locking lever is turned from'the :position FOR LOOMS.

1921. Serial No. 486,471.

shown in ig. 3 to the position shown in Fig. 2, the bolt is lifted out of its position over theshaftinto its inoperative position. The lockingilever (i islalso provided with a locking cam 13, which is adaptedtoengage the upper surface l of the grooved shaft engaging member; 8. Thus, when the lock ing lever is turned from the position shown in Fig. 2 to the position shown in Fig. 3, I

the bolt is permitted by the cams 12 to slide down the incline 15 of the bracket 2 into theposition shown in Fig. 3, and after it has slid down into the position shown in Fig.3, then thelocking cam 13 enters the recess 16 inthe bolt, and engages the upper surface [14, and holds the bolt from disp ac e I I The-above described arrangement is such that when the lockingl'ever 6 is turned from the. position "shown in Fig. :2, it permits the bolt to slide down the incline 15 into locking position, and once there the cam l3swings over the upper surface ofthe shaft engaging member 8, andbecause of its shape it swings as fares the downward movement of the shaft engaging member 8 permits. Then the Weight of the handle 6 tends to move the cam :13 inward on ito'p-of the shaft engaging member 8, and with any jar or vibration. of the-parts, the cam 13 tendsv to move farther and ,always holds the bolt from movement, so that any rising movement of the warp beam is prevented. The locking cam not only holds the bolt fromescape from its locking position, but automatically presses the shaft engaging. member downwardly.as $far as it will go, and prevents any umpmgof the warp beam because it alwaystakes up any slack or'back lash-between the bolt and. the gudgeons, and this irrespective of variations in size of the t gudgeons which, owing 1 to wear, are. not exactly, uniform iii-diameter. The friction between the look and the .gud geons on the warp beamisof no material consequence because a very much heavier friction is exerted on the warp beamby the tension mechanism, Furthermore, it is to be noted that when the locking lever is thrown into lockingposition, the pressure exerted-by the lever onfthebolt to hold the gudgeons in their bearings isalonga straight line connecting the pivot 5, of the locking lever and the g ud'geons 3 of the warp beam.

The bracket is provided with the usual beam rest recesses 17 which receive the beam ends in loading the beam on to the loom and in taking off the exhausted beams.

The present beam lock affords a construction for locking the warp beam in place on the loom with a single movement of the locking lever, which brings the bolt into locking position, and in addition it affords a construction in which, by simply turning the locking lever in the opposite direction, the bolt is withdrawn from looking position and lifted out of the way of the beam so that an exhausted beam may be easily removed and a new beam put on. In addition this beam lock secures the beam from jumping, because it automatically takes up any back lash between the beam ends and the bolts which hold them in their bearings. The construction affords a wide mouth for access of the beam to the bearings in the bracket, facilitating the use and convenient removal of an empty beam and the putting on of a new beam.

Having thus described the invention, what is claimed is:

l. A beam lock for looms having, in combination, a bearing member provided with bearings for the warp beam gudgeon, a bolt to rest upon and hold the gudgeon in the bearing, the bearing member being provided with an overhanging arm, a locking lever pivoted at the end of the overhanging arm above the gudgeon bearing, the bolt being provided with a pair of arms connected with the gudgeon bearing portion and extending on opposite sides of the overhanging arm, the bolt arms being provided at their upper ends with ears, and being also provided with a locking surface, the locking lever being provided with a pair of bolt-withdrawing cams for engaging the ears on the arms of the bolt, and with a locking cam for engaging the locking surface of the bolt to hold the bolt in locked position.

2. A beam lock for looms having, in combination, a bearing member provided with a bearing for the warp beam and having an incline adjacent to the bearing, a bolt movable up and down the incline and having a portion to rest upon and hold the warp beam gudgeon in the bearing, a locking lever provided with a bolt withdrawing cam and a bolt locking cam, said bolt having a surface adapted to be engaged by the bolt withdrawing cam for removing the bolt from its gudgeon holding position and movingit up the incline, and a surface adapted to be engaged by the bolt locking cam for locking the bolt against the gudgeon, the bolt being adapted to slide down the incline when the locking lever is moved to disengage the boltwithdrawing cam from the bolt.

3. A beam lock for looms having, in combination. a bearing member provided with a bearing for the warp beam, an overhanging arm having a pivot above the bearing, a locking lever pivoted on said arm, a bolt having a gudgeon engaging portion and two arms extended upwardly therefrom at opposite sides of the overhanging arm, the looking lever being provided with cams adapted to engage said arms for moving the bolt out of locking position.

I 4. A beam lock for looms having, in combination, a bearing member provided with a bearing for a warp beam, said member being provided with an overhanging arm, a locking lever pivoted on the overhanging arm, a bolt having a portion adapted to close the beam bearing, and two arms, one extending on each side of the overhanging arm, said locking lever being provided with a cam for moving the bolt to inoperative position, and with a locking cam for locking the bolt in operative bearing closing position.

5. A beam lock for looms having, in combination, a member provided with a bearing for the warp beam, a bolt to rest upon and hold the warp beam gudgeon in the bearing, said bolt being provided with two rearwardly extending arms and with a locking surface, and a locking lever pivotally mounted to turn on an axis above the bearing provided with a pair of cams for moving the bolt to unlocked position by engage ment with the arms of the bolt, and also provided with another cam for locking the bolt in locked position. i

6. A beam lock for looms having, in combination, a bearing member provided with a bearing for the warp beam, a bolt for closing the bearing, a locking member pivotal above the vbearing for holding the bolt in locked position, said bolt and locking member having cooperative surfaces which contact substantially on a direct vertical line between the locking lever pivot and the warp beam gudgeon, so as positively to hold the gudgeon from motion in the bearing.

7 A beam lock for looms having, in combination, abearing' member provided with a bearing for the-warp beam and having an incline adjacent to the bearing, an overhanging arm, a locking lever pivoted on the over-hanging arm directly above the bearing, a bolt movable up and down the incline and having two arms extending on opposite sides of the over-hanging arm, and a cam member on the locking lever having a bolt withdrawing cam adapted to engage the two arms of the bolt and a bolt locking cam adapted to engage the bolt to lock it against the gudgeon of the warp beam.

8. A beam lock for looms having, in combination, a bearing member provided with a bearing for the warp beam gudgeon, and having an inclined surface extending forwardly from the bearing, an overhanging arm extending upwardly from the bearing member and having a. pivot located over the bearing, a bolt having a gudgeon-engaging portion, an arm extending forwardly there from, then upwardly, and carrying on its upper end-a bolt-withdrawing ca1n-engaging portion, said bolt also being provided with a locking surface opposite the bolt engaging portion, a locking lever pivoted on the overhanging arm of the bearing member provided with an operating arm and two cams, one a bolt-withdrawing cam to engage the ends of the arm oi the bolt for withdrawing the bolt from looking position,

ing arm, a locking lever pivotally mounted in the pivot of the overhanging arm pro-;

vided with two bolt-withdrawing'oams and a single bolt-locking cam,-and a bolt having a gndgeon-engaging member for engaging the g'udgeon in the bearing provided with twioarms :itendin rearwardl one on each i b 7 side. of the overhanging arm, and thence npwardly, and having portions at their ends to engage the bolt-Withdrawing cams, the portion ofthe bolt above the gudgeon-engaging portion being adapted to be engaged by the bolt-locking cam, operating when: the locking lever is swung forwardly, to cause the bolt-withdrawing cams to slide the bolt rearwardly up the inclines, thereby withdrawing it from looking position, and

when the locking lever is turned rearwardly, to withdraw the bolt-Withdrawing cams from engagement with the bolt arms to permit the latter to descend'to locking position, in which the bolt-locking cam will engage the bolt and hold it locked.

JOHN MAGILL. 

